Pharrell Williams has admitted that he didn't expect to be so popular at the moment.

The singer reached notoriety in N.E.R.D in the early 2000s, but his recent fame has reached a whole new level.

The US star recently appeared on Robin Thicke's 'Blurred Lines' and Daft Punk's 'Get Lucky' and these helped to bring Williams to the mainstream.

He then released the solo single 'Happy' and speaking to The Sun, Williams admitted that he didn't think his music would be so popular:

"It's crazy, I didn't expect any of this. I just wanted to make something that was feelgood and celebratory - something which I felt was visceral and real."

Speaking meanwhile about how his Daft Punk collaboration come about, Williams said:

"It was too much. I wasn't thinking about life in right way. I thought my days as an artist were over. I was happy guesting or producing work and that suited me fine. But then Daft Punk and last year happened and it just blew me away and now I'm in an appreciative place and it means more. Working with Daft Punk has been a huge part of the journey to where I am today. We got talking and I'm just curious about music, full-stop, and curious about Daft Punk. I said to them, 'If you just want me to play tambourine, I'll do it' - and that was it."

The singer and producer meanwhile is due to release his new album 'G I R L' on March 3.

Watch Pharrell Williams' recent videos below: